Refactor Todo adoption code.

[plomtask] / plomtask / todos.py

diff --git a/plomtask/todos.py b/plomtask/todos.py
index cf4c33048ba779fb2145e21a4f325f55b6bfe024..ed78ca947b359286456e7dcc4c664fcb32961c12 100644 (file)
--- a/plomtask/todos.py
+++ b/plomtask/todos.py
@@ -1,6 +1,6 @@
 """Actionables."""
 from __future__ import annotations
-from collections import namedtuple
+from dataclasses import dataclass
 from typing import Any
 from sqlite3 import Row
 from plomtask.db import DatabaseConnection, BaseModel
@@ -10,8 +10,13 @@ from plomtask.exceptions import (NotFoundException, BadFormatException,
                                  HandledException)
 
 
-TodoStepsNode = namedtuple('TodoStepsNode',
-                           ('item', 'is_todo', 'children', 'seen'))
+@dataclass
+class TodoStepsNode:
+    """Collects what's useful to know for Todo/Condition tree display."""
+    item: Todo | Condition
+    is_todo: bool
+    children: list[TodoStepsNode]
+    seen: bool
 
 
 class Todo(BaseModel, ConditionsRelations):
@@ -34,9 +39,9 @@ class Todo(BaseModel, ConditionsRelations):
         self.enables: list[Condition] = []
         self.disables: list[Condition] = []
         if not self.id_:
-            self.conditions = process.conditions[:]
-            self.enables = process.enables[:]
-            self.disables = process.disables[:]
+            self.conditions = self.process.conditions[:]
+            self.enables = self.process.enables[:]
+            self.disables = self.process.disables[:]
 
     @classmethod
     def from_table_row(cls, db_conn: DatabaseConnection,
@@ -122,6 +127,17 @@ class Todo(BaseModel, ConditionsRelations):
         """Return ID of tasked Process."""
         return self.process.id_
 
+    @property
+    def unsatisfied_dependencies(self) -> list[int]:
+        """Return Process IDs of .process.explicit_steps not in .children."""
+        child_process_ids = {c.process.id_ for c in self.children}
+        unsatisfied: list[int] = []
+        for process_id in [s.step_process_id
+                           for s in self.process.explicit_steps]:
+            if process_id not in child_process_ids:
+                unsatisfied += [process_id]
+        return unsatisfied
+
     @property
     def is_done(self) -> bool:
         """Wrapper around self._is_done so we can control its setter."""
@@ -139,6 +155,13 @@ class Todo(BaseModel, ConditionsRelations):
                 for condition in self.disables:
                     condition.is_active = False
 
+    def adopt_from(self, todos: list[Todo]) -> None:
+        """As far as possible, fill unsatisfied dependencies from todos."""
+        for process_id in self.unsatisfied_dependencies:
+            for todo in [t for t in todos if t.process.id_ == process_id]:
+                self.add_child(todo)
+                break
+
     def get_step_tree(self, seen_todos: set[int],
                       seen_conditions: set[int]) -> TodoStepsNode:
         """Return tree of depended-on Todos and Conditions."""
@@ -171,11 +194,13 @@ class Todo(BaseModel, ConditionsRelations):
 
     def add_child(self, child: Todo) -> None:
         """Add child to self.children, avoid recursion, update parenthoods."""
+
         def walk_steps(node: Todo) -> None:
             if node.id_ == self.id_:
                 raise BadFormatException('bad child choice causes recursion')
             for child in node.children:
                 walk_steps(child)
+
         if self.id_ is None:
             raise HandledException('Can only add children to saved Todos.')
         if child.id_ is None: